1983年,世界矿产铜总产量达796万吨,其中,资本主义国家的产量约占四分之三。然而,世界主要产铜国智利、美国、赞比亚、扎伊尔、秘鲁等国的矿产铜产量却在不同程度上下降了,美国、加拿大等国的开工率仅为50～60%,除了某些社会因素外,主要由于发达国家的铜消费量普遍下降,国际市场 In 1983, the world’s total output of mineral copper reached 7.96 million tons, of which about three-quarters of the capitalist countries. However, the output of mineral copper in the world’s major copper producing countries, Chile, the United States, Zambia, Zaire and Peru, has dropped to varying degrees. The operating rates in the United States, Canada and other countries are only 50-60%, except for certain Social factors, mainly due to the general decline in copper consumption in developed countries, the international market